Donna Lettieri-Marks, Psy.d., Ltd
NPI 1649418518 · Adult Mental Health Clinic/Center · Naperville, IL
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Donna Lettieri-Marks, Psy.d., Ltd is a Adult Mental Health Clinic/Center organization in Naperville, IL (NPI 1649418518).
Provider details
- NPI number
- 1649418518
- Entity type
- Organization
- Primary specialty
- Adult Mental Health Clinic/CenterAmbulatory Health Care Facilities
- Organization subpart
- No
- Authorized official
- Donna Lettieri-Marks, Clinical Psychologist/Owner(630) 904-6610
- License
- 071-005423 (IL)
Specialties & taxonomies
Ambulatory Health Care Facilities
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-01-29
- Last updated
- 2009-01-29
Frequently asked questions
- What is Donna Lettieri-Marks, Psy.d., Ltd's NPI number?
- Donna Lettieri-Marks, Psy.d., Ltd's National Provider Identifier (NPI) is 1649418518, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Donna Lettieri-Marks, Psy.d., Ltd?
- Donna Lettieri-Marks, Psy.d., Ltd is classified in the NPPES registry as Adult Mental Health Clinic/Center (Ambulatory Health Care Facilities).
- Where is Donna Lettieri-Marks, Psy.d., Ltd located?
- Donna Lettieri-Marks, Psy.d., Ltd's practice location on file with NPPES is 55 S Main St, Naperville, IL 60540-5372.
- What is Donna Lettieri-Marks, Psy.d., Ltd's phone number?
- The practice phone number listed in the NPPES registry for Donna Lettieri-Marks, Psy.d., Ltd is (630) 904-6610.
- Does Donna Lettieri-Marks, Psy.d., Ltd accept Medicare?
- Donna Lettieri-Marks, Psy.d., Ltd is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Donna Lettieri-Marks, Psy.d., Ltd?
- The authorized official listed on Donna Lettieri-Marks, Psy.d., Ltd's NPPES record is Donna Lettieri-Marks, Clinical Psychologist/Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Donna Lettieri-Marks, Psy.d., Ltd's NPI active?
- Yes — Donna Lettieri-Marks, Psy.d., Ltd's NPI (1649418518) is active in the NPPES registry as of the last update on 2009-01-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.